19-3618; Rev 3; 5/07
IT
TION K
VALUA
E
BLE
AVAILA
Audio/Video Switch for Dual SCART Connectors
General Description
The MAX4397 dual SCART switch matrix routes audio
and video signals between an MPEG encoder and two
external SCART connectors under I
2
C control, and
meets the requirements of EN50049-1, IEC 933-1,
Canal+, and BSkyB standards.
The video and audio channels feature input source
selection multiplexers, input buffers, and output buffers
for routing all inputs to selected outputs. The MAX4397D
audio encoder input is differential DC-coupled, while the
MAX4397S audio encoder input is single-ended AC-
coupled. Except for the MAX4397D’s audio encoder
input, all other inputs and outputs are AC-coupled with
internal DC-biasing set to predefined levels.
The MAX4397 provides programmable gain control from
+5dB to +7dB in 1dB steps for Red, Green, and Blue
component video signals. All other video outputs have a
fixed +6dB gain. Additional features include an internal
Luma and Chroma (Y/C) mixer that generates a
Composite video signal (CVBS) to supply an RF
modulator output, and internal video reconstruction low-
pass filters with passband ripple between -1dB and
+1dB from 100kHz to 5.5MHz. The MAX4397 TV audio
channel features clickless switching and programmable
volume control from -56dB to +6dB in 2dB steps. The
VCR audio output also has programmable gain for
-6dB, 0dB, or +6dB. The device also generates
monaural audio from left and right stereo inputs.
All audio drivers deliver a 3.0V
RMS
minimum output.
The MAX4397 operates with standard 5V and 12V
power supplies and supports slow-switching and fast-
switching signals. The I
2
C interface programs the gain
and volume control, and selects the input source
for routing.
The MAX4397 is available in a compact 48-pin thin QFN
package and is specified over the 0°C to +70°C com-
mercial temperature range.
♦
Video Outputs Drive 2V
P-P
into 150Ω
♦
Audio Outputs Drive 3V
RMS
into 10kΩ
♦
Clickless, Popless Audio Gain Control
and Switching
♦
AC-Coupled Video Inputs with Internal Clamp
and Bias
♦
DC-Coupled Video Outputs
♦
Composite Video Signal Created Internally from
Y/C Inputs
♦
Internal Video Reconstruction Filters Provide
-40dB at 27MHz
♦
Differential (MAX4397D) or Single-Ended
(MAX4397S) Audio Encoder Input
♦
Red/Chroma Switch for Bidirectional I/O
♦
I
2
C-Programmable RGB Gain from +5dB to +7dB
♦
I
2
C-Programmable Audio Gain Control from +6dB
to -56dB
♦
Meets EN50049-1, IEC 933-1, Canal+, and BSkyB
Requirements
Features
MAX4397
Ordering Information
PART
MAX4397DCTM
MAX4397SCTM
TEMP
RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
48 Thin QFN-EP*
(7mm x 7mm)
48 Thin QFN-EP*
(7mm x 7mm)
PKG
CODE
T4877-6
T4877-6
Applications
Satellite Set-Top Boxes
Cable Set-Top Boxes
TVs
VCRs
DVDs
*EP
= Exposed paddle.
Pin Configuration and Typical Application Circuits appear at
end of data sheet.
System Block Diagram appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Audio/Video Switch for Dual SCART Connectors
MAX4397
ABSOLUTE MAXIMUM RATINGS
V
VID
to GNDVID........................................................-0.3V to +6V
V
12
to GNDAUD .....................................................-0.3V to +14V
V
AUD
to GNDAUD ....................................................-0.3V to +6V
GNDAUD to GNDVID ............................................-0.1V to +0.1V
All Video Inputs, ENCIN_FS, VCRIN_FS,
SET to GNDVID......................................-0.3V to (V
VID
+ 0.3V)
All Audio Inputs,
AUDBIAS to GNDAUD .........................-0.3V to (V
AUD
+ 0.3V)
SDA, SCL, DEV_ADDR to GNDVID ..........................-0.3V to +6V
All Audio Outputs, TV_SS,
VCR_SS to GNDAUD...............................-0.3V to (V
12
+ 0.3V)
All Video Outputs, TVOUT_FS to V
VID
, V
AUD
,
GNDAUD, GNDVID ................................................Continuous
All Audio Outputs to V
VID
, V
AUD
, V
12
,
GNDVID, GNDAUD ................................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
48-Pin Thin QFN (derate 27mW/°C above +70°C)......2105.3mW
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
12
= 12V, V
VID
= V
AUD
= 5V, 0.1µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V
AUD
to GNDAUD,
V
12
to GNDAUD, and V
VID
to GNDVID
,
SET = 100kΩ nominal, R
LOAD
= 150Ω, T
A
= 0°C to +70°C, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
PARAMETER
V
VID
Supply Voltage Range
V
AUD
Supply Voltage Range
V
12
Supply Voltage Range
V
VID
Quiescent Supply Current
SYMBOL
V
VID
V
AUD
V
12
I
VID_Q
CONDITIONS
Inferred from video gain test at 4.75V
and 5.2V
Inferred from audio gain test at 4.75V
and 5.2V
Inferred from slow switching levels
All video output amplifiers are enabled,
no load
All video output amplifiers are in shutdown,
and TV_FS_OUT driver is in shutdown, no
load
No load
No load
CVBS and Y/C, 1V
P-P
input
Voltage Gain
G_V
R,G,B, 1V
P-P
input, (programmable gain
control)
T
A
= +25°C, f = 6MHz, V
IN
= 1V
P-P
T
A
= +25°C, f = 27MHz, V
IN
= 1V
P-P
V
OUT
= 2V
P-P
V
OUT
= 2V
P-P
, settle to 0.1% (Note 2)
1V
P-P
input, between RGB or Y/C
5-step modulated staircase
5-step modulated staircase
V
IN
= 1V
P-P
-0.5
0.4
0.2
65
35
+5.5
+4.5
+5.5
+6.5
LP Filter Attenuation
LP Filter Suppression
Slew Rate
Settling Time
Gain Matching
Differential Gain
Differential Phase
Signal-to-RMS Noise
ATTN
SPPR
SR
t
S
AG
DG
DP
SNR_V
MIN
4.75
4.75
11.4
TYP
5.0
5.0
12.0
69
MAX
5.25
5.25
12.6
100
UNITS
V
V
V
mA
V
VID
Standby Supply Current
V
AUD
Quiescent Supply Current
V
12
Quiescent Supply Current
VIDEO CHARACTERISTICS
I
VID_S
I
AUD_Q
I
12_Q
40
2.4
3.6
+6.0
+5.0
+6.0
+7.0
1.2
50
8
380
60
6
6
+6.5
+5.5
+6.5
+7.5
3.3
mA
mA
mA
dB
dB
dB
V/µs
ns
+0.5
dB
%
degrees
dB
2
_______________________________________________________________________________________
Audio/Video Switch for Dual SCART Connectors
ELECTRICAL CHARACTERISTICS (continued)
(V
12
= 12V, V
VID
= V
AUD
= 5V, 0.1µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V
AUD
to GNDAUD,
V
12
to GNDAUD, and V
VID
to GNDVID
,
SET = 100kΩ nominal, R
LOAD
= 150Ω, T
A
= 0°C to +70°C, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
PARAMETER
Group Delay Variation
Sync-Tip Clamp Level
Chroma Bias
Droop
Power-Supply Rejection Ratio
Input Impedance
Input Clamp Current
Pulldown Resistance
SYMBOL
∆GD
V_CLMP
V_BIAS
D
PSRR_V
Z
IN
I
CLMP
RP
CONDITIONS
f = 0.1MHz to 4.43MHz
RGB, Composite, and Luma input, no signal,
no load
Chroma input only, no signal, no load
Set by input current
DC, 0.5V
P-P
CVBS, Y, or RGB video inputs, V
IN
> V_
CLMP
Chroma video input, V
IN
= V_
BIAS
V
IN
= 1.75V
Enable VCR_R/C_OUT and TV_R/C_OUT
pulldown through I
2
C, (see registers 7 and 9
for loading register details)
RGB, Composite, and Luma, no signal,
no load
Chroma, no signal, no load
Crosstalk
Mute Suppression
XTLK
Between any two active inputs, f = 4.43MHz,
V
IN
= 1V
P-P
2.5
-2
48
4
11
5
10
8.0
MIN
TYP
14
1.21
1.9
+2
MAX
UNITS
nS
V
V
%
dB
MΩ
kΩ
µA
Ω
MAX4397
Output Pin Bias Voltage
V
OUT
1.08
2.27
-50
-50
V
dB
dB
M_SPR_V f = 4.43MHz, V
IN
= 1V
P-P
, on one input only
AUDIO CHARACTERISTICS (Note 3)
TV or VCR to stereo, gain = 0dB,
V
IN
= 1V
P-P
Voltage Gain (From Application
Input)
G_A
TV or VCR to mono, gain = 0dB, V
IN
= 1V
P-P
ENC to stereo, gain = 0dB, V
IN
= 1V
P-P
ENC to mono, gain = 0dB, V
IN
= 1V
P-P
Gain Matching Between
Channels
Flatness
Frequency Bandwidth
Input DC Level (Excluding
Encoder Inputs that are High
Impedance)
Encoder Input Common-Mode
Voltage Range
∆G_A
∆A
BW
Gain = 0dB, V
IN
= 1V
P-P
f = 20Hz to 20kHz, 0.5V
RMS
input,
gain = 0dB
0.5V
RMS
input, frequency where output is
-3dB referenced to 1kHz
Gain = 0dB
MAX4397D only,
input differential signal = 0V
-0.5
2.5
3.02
6.02
-0.5
0
3
3.52
6.52
0
0.01
230
0.2308
x V
12
1.2
V
AUD
-
0.7
+0.5
3.5
4.02
7.02
+0.5
dB
dB
kHz
dB
V
IN
V
V
CM
V
_______________________________________________________________________________________
3
Audio/Video Switch for Dual SCART Connectors
MAX4397
ELECTRICAL CHARACTERISTICS (continued)
(V
12
= 12V, V
VID
= V
AUD
= 5V, 0.1µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V
AUD
to GNDAUD,
V
12
to GNDAUD, and V
VID
to GNDVID
,
SET = 100kΩ nominal, R
LOAD
= 150Ω, T
A
= 0°C to +70°C, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
PARAMETER
Encoder Common-Mode
Rejection Ratio
SYMBOL
CMRR
CONDITIONS
MAX4397D only, over V
CM
range
Single-ended inputs, f = 1kHz, THD < 1%
Input Signal Amplitude
V
IN_AC
ENC inputs differential level, MAX4397D,
f = 1kHz, THD < 1%
ENC inputs single-ended, MAX4397S,
f = 1kHz, THD < 1%
Single ended: VCR_INR, VCR_INL, TV_INR,
TV_INL
Input Resistance (Measured at
Parts Input)
R
IN
Encoder, MAX4397D: ENC_INL+, ENC_INL-,
ENC_INR+, ENC_INR-
Encoder, MAX4397S: ENC_INL, ENC_INR
Output DC Level
Signal-to-Noise Ratio
Total Harmonic Distortion Plus
Noise
Output Impedance
V
OUT_DC
SNR_A
THD+N
ZO
V
IN
= 0V
f = 1.0kHz, 1V
RMS
application input,
gain = 0dB, 20Hz to 20kHz
R
LOAD
= 10kΩ, f = 1.0kHz, 0.5V
RMS
output
R
LOAD
= 10kΩ, f = 1.0kHz, 2V
RMS
output
f = 1kHz
1.414V
P-P
input, programmable gain to TV
SCART volume control range extends from
-56dB to +6dB
1.414V
P-P
input, programmable gain to VCR
audio extends from -6dB to +6dB
From V
12,
f = 1kHz, 0.5V
P-P
,
(C
AUD_BIAS
= 47µF), gain = 0dB
From V
AUD
, f = 1kHz, 0.5V
P-P,
V
AUD
≥
+4.75V, V
AUD
≤
+5.25V, gain = 0dB
f = 1kHz, 0.5V
RMS
input, set through I
2
C, see
register 1 for loading register details
f = 1kHz, 2.5V
RMS
input, gain = 6dB,
THD < 1%
f = 1kHz, 0.5V
RMS
input, gain = 0dB
1.5
MIN
TYP
40
3
2.08
1.31
0.1
1
0.1
0.5 x
V
12
95
0.004
0.004
1
2
2.5
dB
5.5
6
75
dB
75
90
3.6
80
dB
V
RMS
dB
6.5
V
dB
%
Ω
MΩ
V
RMS
MAX
UNITS
dB
Volume Attenuation Step
ASTEP
Power-Supply Rejection Ratio
PSRR_A
Mute Suppression
Audio Clipping Level
Left-to-Right Crosstalk
M_SPR_A
VCLIP
XTLK_LR
Crosstalk
TV SCART to VCR SCART or VCR SCART to
XTLK_CC TV SCART, f = 1kHz, 0.5V
RMS
input, gain =
0dB
90
dB
4
_______________________________________________________________________________________
Audio/Video Switch for Dual SCART Connectors
ELECTRICAL CHARACTERISTICS (continued)
(V
12
= 12V, V
VID
= V
AUD
= 5V, 0.1µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V
AUD
to GNDAUD,
V
12
to GNDAUD, and V
VID
to GNDVID
,
SET = 100kΩ nominal, R
LOAD
= 150Ω, T
A
= 0°C to +70°C, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
PARAMETER
Low-Level Input Voltage
High-Level Input Voltage
Hysteresis of Schmitt Trigger
Input
SDA Low-Level Output Voltage
Output Fall Time for SDA Line
Spike Suppression
Input Current
Input Capacitance
SCL Clock Frequency
Hold Time
Low Period of SCL Clock
High Period of SCL Clock
Setup Time for a Repeated Start
Condition
Data Hold Time
Data Setup Time
Setup Time for Stop Condition
Bus Free Time Between a Stop
and Start
OTHER DIGITAL PINS (Note 5)
DEV_ADDR Low Level
DEV_ADDR High Level
SLOW SWITCHING SECTION (Note 5)
Input Low Level
Input Medium Level
Input High Level
Input Current
Output Low Level
Output Medium Level
Output High Level
10kΩ to ground, internal TV,
11.4V < V
12
< 12.6V
10kΩ to ground, external 16/9,
11.4V < V
12
< 12.6V
10kΩ to ground, external 4/3,
11.4V < V
12
< 12.6V
0
5.0
10
0
4.5
9.5
50
2
7.0
V
12
100
1.5
6.5
V
12
V
V
V
µA
V
V
V
2.6
0.8
V
V
t
HD,STA
t
LOW
t
HIGH
t
SU,STA
t
HD,DAT
t
SU,DAT
t
SU,STO
t
BUF
0
0.6
1.3
0.6
0.6
0
100
0.6
1.3
0.9
-10
5
400
V
OL
I
SINK
= 3mA
I
SINK
= 6mA
400pF bus load
50
+10
SYMBOL
V
IL
V
IH
CONDITIONS
MIN
0
2.6
0.2
0.4
0.6
250
TYP
MAX
0.8
UNITS
V
V
V
V
ns
ns
µA
pF
kHz
µs
µs
µs
µs
µs
ns
µs
µs
MAX4397
DIGITAL INTERFACE: SDA AND SCL (Note 5)
_______________________________________________________________________________________
5
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